Animals 60 Male gene expression mouse nonhuman 60 controlled study 54 Mice 52 animal experiment 49 male 49 priority journal 49 article 38 animal tissue 34 animal cell 29 animal 28 metabolism 26 Female 25 genetics 24 animal model 23 messenger RNA 23 Article 22 Mice, Inbred C57BL 22 female 21 protein expression 19 RNA, Messenger 17 unclassified drug 17 Reverse Transcriptase Polymerase Chain Reaction 15 reverse transcription polymerase chain reaction 14 Humans 13 cell proliferation 13 in vivo study 13